Congratulations! I’d also recommend reading up on these articles. According to Dr Izabella Wentz, known as The Thyroid Pharmacist, your TSH should be no more than 2.
These two articles by her are about the thyroid and pregnancy and are invaluable:
Content on HealthUnlocked does not replace the relationship between you and doctors or other healthcare professionals nor the advice you receive from them.
Never delay seeking advice or dialling emergency services because of something that you have read on HealthUnlocked.